package com.ricky.spring.demo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author leiruiqi
 */

@Configuration
@EnableAsync
//@EnableScheduling
public class ThreadAsyncConfig {

    /**
     * 线程池维护线程的最少数量
     */
    private int corePoolSize = 20;

    /**
     * 线程池维护线程的最大数量
     */
    private int maxPoolSize = 100;

    /**
     * 缓存队列
     */
    private int queueCapacity = 100;

    /**
     * 允许的空闲时间
     */
    private int keepAlive = 60;

   // @Bean
    public Executor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(corePoolSize);
        executor.setMaxPoolSize(maxPoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setThreadNamePrefix("mqExecutor-");
        // rejection-policy：当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
        //对拒绝task的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.setKeepAliveSeconds(keepAlive);
        executor.initialize();
        return executor;
    }

}
